... even in the special case enucleated in the first part of its proof,Theorem 1.3 follows quite easily when E is a bounded set. For the reader’sconvenience, we present the proof of this case separately, ... byE(t).Proof. We shall assume that t = 0, the other cases being completelyanalogous, and denoteE(0)simply byE. As in the proof of Lemma 4.3, weassume also, without loss of generality, ... consequence of (4.60), (4.62) and (4.63),and the last one is due to the first three equalities applied withE replacedby E.Proof of Theorem 1.3: The general case. There is no loss of general-ity...